UFC23 is a frontend for ultrasonic flow measurements in water, heat and gas meters. It uses a high-performance front-end capable of driving two transducers and processing the received signal to extract the time of flight (TOF) information with high precision and offset stability.
A highly programmable amplifier—up to 60 dB (gas) and 20 dB (water)—allows for the handling of weak receive amplitudes.
A fire burst generator generates bursts up to 4.4 MHz, based on a 20 MHz reference. A split-burst feature supports the correction of phase jumps. Besides the 3.3V single-ended drivers, the UFC23 offers full-bridge drivers for increased voltage across the transducer. The combination of a full-bridge, higher gain, higher bandwidth, and frequency adjustment makes it suitable for gas meter applications.
A 160-word RAM allows access to all time data, as well as the accumulation of data (batch mode) and reduced wake-up cycles for an external μC. With 1 μA standby current and low operating current, it is optimized for battery-operated systems.
